# -*- coding: utf-8 -*-
"""Data processing: numpy, pandas"""
import numpy as np
import pandas as pd

# NumPy example
arr = np.array([1, 2, 3, 4, 5])
print("numpy mean:", np.mean(arr))

# pandas example
df = pd.DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]})
print("pandas head:\n", df.head())